关键词: 植株再生, 植株再生

Abstract: On the basis of the concept of domestic PSR model, combining the features of the arid area of northwest land-use and actual situation, the authors established the land-use system health evaluation systems based on improved PSR model with the data from 2001 to 2010. Quantitative research methods, such as entropy, linear weighting method and obstacles diagnostics etc., were used to evaluate the health of Yumen land-use systems. The results showed that: (1) combined with the features of the arid area of northwest land-use and actual situation, the improved PSR model, arid land use system health evaluation system and the evaluation results were coincide with the actual situation of the study area; (2) the Yumen land use system health level was continuously improved from 2001 to 2010, its composite index rose from 0.2510 to 0.7027, health level was gradually upgraded from‘unhealthy’to‘sub-health state’; (3) barriers to healthy land use systems focused on aspects of the system response and the system state, major factors included the proportion of construction land, environmental pollution control investment growth rate, per capita construction land, handling rate of illegal land use cases, per capita net income of farmers and so on; (4) to improve the system of land-use health standards, it must be based on the results of the evaluation of the land use system health, adhered to the scientific concept of development, adjusted to the industrial restructuring and further transform the economic development way.